/**
 * @1900-2100区间内的公历、农历互转
 * @Version 1.0.3
 * @公历转农历：calendar.solar2lunar(1987,11,01); //[you can ignore params of prefix 0]
 * @农历转公历：calendar.lunar2solar(1987,09,10); //[you can ignore params of prefix 0]
 */
/* 公历年月日转农历数据 返回json */
// calendar.solar2lunar(1987,11,01);
/** 农历年月日转公历年月日 **/
// calendar.lunar2solar(1987,9,10);
// 调用以上方法后返回类似如下object（json）具体以上就不需要解释了吧！
// c开头的是公历各属性值 l开头的自然就是农历咯 gz开头的就是天干地支纪年的数据啦~
// {
//  Animal: "兔",
//  IDayCn: "初十",
//  IMonthCn: "九月",
//  Term: null,
//  astro: "天蝎座",
//  cDay: 1,
//  cMonth: 11,
//  cYear: 1987,
//  gzDay: "甲寅",
//  gzMonth: "庚戌",
//  gzYear: "丁卯",
//  isLeap: false,
//  isTerm: false,
//  isToday: false,
//  lDay: 10,
//  lMonth: 9,
//  lYear: 1987,
//  nWeek: 7,
//  ncWeek: "星期日"
// }
// 该代码还有其他可以调用的方法，请自己查看代码中的详细注释
const calendar = {
  /**
   * 农历1900-2100的润大小信息表
   * @Array Of Property
   * @return Hex
   */
  lunarInfo: [
    0x04bd8,
    0x04ae0,
    0x0a570,
    0x054d5,
    0x0d260,
    0x0d950,
    0x16554,
    0x056a0,
    0x09ad0,
    0x055d2, // 1900-1909
    0x04ae0,
    0x0a5b6,
    0x0a4d0,
    0x0d250,
    0x1d255,
    0x0b540,
    0x0d6a0,
    0x0ada2,
    0x095b0,
    0x14977, // 1910-1919
    0x04970,
    0x0a4b0,
    0x0b4b5,
    0x06a50,
    0x06d40,
    0x1ab54,
    0x02b60,
    0x09570,
    0x052f2,
    0x04970, // 1920-1929
    0x06566,
    0x0d4a0,
    0x0ea50,
    0x06e95,
    0x05ad0,
    0x02b60,
    0x186e3,
    0x092e0,
    0x1c8d7,
    0x0c950, // 1930-1939
    0x0d4a0,
    0x1d8a6,
    0x0b550,
    0x056a0,
    0x1a5b4,
    0x025d0,
    0x092d0,
    0x0d2b2,
    0x0a950,
    0x0b557, // 1940-1949
    0x06ca0,
    0x0b550,
    0x15355,
    0x04da0,
    0x0a5b0,
    0x14573,
    0x052b0,
    0x0a9a8,
    0x0e950,
    0x06aa0, // 1950-1959
    0x0aea6,
    0x0ab50,
    0x04b60,
    0x0aae4,
    0x0a570,
    0x05260,
    0x0f263,
    0x0d950,
    0x05b57,
    0x056a0, // 1960-1969
    0x096d0,
    0x04dd5,
    0x04ad0,
    0x0a4d0,
    0x0d4d4,
    0x0d250,
    0x0d558,
    0x0b540,
    0x0b6a0,
    0x195a6, // 1970-1979
    0x095b0,
    0x049b0,
    0x0a974,
    0x0a4b0,
    0x0b27a,
    0x06a50,
    0x06d40,
    0x0af46,
    0x0ab60,
    0x09570, // 1980-1989
    0x04af5,
    0x04970,
    0x064b0,
    0x074a3,
    0x0ea50,
    0x06b58,
    0x055c0,
    0x0ab60,
    0x096d5,
    0x092e0, // 1990-1999
    0x0c960,
    0x0d954,
    0x0d4a0,
    0x0da50,
    0x07552,
    0x056a0,
    0x0abb7,
    0x025d0,
    0x092d0,
    0x0cab5, // 2000-2009
    0x0a950,
    0x0b4a0,
    0x0baa4,
    0x0ad50,
    0x055d9,
    0x04ba0,
    0x0a5b0,
    0x15176,
    0x052b0,
    0x0a930, // 2010-2019
    0x07954,
    0x06aa0,
    0x0ad50,
    0x05b52,
    0x04b60,
    0x0a6e6,
    0x0a4e0,
    0x0d260,
    0x0ea65,
    0x0d530, // 2020-2029
    0x05aa0,
    0x076a3,
    0x096d0,
    0x04afb,
    0x04ad0,
    0x0a4d0,
    0x1d0b6,
    0x0d250,
    0x0d520,
    0x0dd45, // 2030-2039
    0x0b5a0,
    0x056d0,
    0x055b2,
    0x049b0,
    0x0a577,
    0x0a4b0,
    0x0aa50,
    0x1b255,
    0x06d20,
    0x0ada0, // 2040-2049
    /** Add By JJonline@JJonline.Cn **/
    0x14b63,
    0x09370,
    0x049f8,
    0x04970,
    0x064b0,
    0x168a6,
    0x0ea50,
    0x06b20,
    0x1a6c4,
    0x0aae0, // 2050-2059
    0x0a2e0,
    0x0d2e3,
    0x0c960,
    0x0d557,
    0x0d4a0,
    0x0da50,
    0x05d55,
    0x056a0,
    0x0a6d0,
    0x055d4, // 2060-2069
    0x052d0,
    0x0a9b8,
    0x0a950,
    0x0b4a0,
    0x0b6a6,
    0x0ad50,
    0x055a0,
    0x0aba4,
    0x0a5b0,
    0x052b0, // 2070-2079
    0x0b273,
    0x06930,
    0x07337,
    0x06aa0,
    0x0ad50,
    0x14b55,
    0x04b60,
    0x0a570,
    0x054e4,
    0x0d160, // 2080-2089
    0x0e968,
    0x0d520,
    0x0daa0,
    0x16aa6,
    0x056d0,
    0x04ae0,
    0x0a9d4,
    0x0a2d0,
    0x0d150,
    0x0f252, // 2090-2099
    0x0d520
  ], // 2100

  /**
   * 公历每个月份的天数普通表
   * @Array Of Property
   * @return Number
   */
  solarMonth: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],

  /**
   * 天干地支之天干速查表
   * @Array Of Property trans["甲","乙","丙","丁","戊","己","庚","辛","壬","癸"]
   * @return Cn string
   */
  Gan: [
    '\u7532',
    '\u4e59',
    '\u4e19',
    '\u4e01',
    '\u620a',
    '\u5df1',
    '\u5e9a',
    '\u8f9b',
    '\u58ec',
    '\u7678'
  ],

  /**
   * 天干地支之地支速查表
   * @Array Of Property
   * @trans["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"]
   * @return Cn string
   */
  Zhi: [
    '\u5b50',
    '\u4e11',
    '\u5bc5',
    '\u536f',
    '\u8fb0',
    '\u5df3',
    '\u5348',
    '\u672a',
    '\u7533',
    '\u9149',
    '\u620c',
    '\u4ea5'
  ],

  /**
   * 天干地支之地支速查表<=>生肖
   * @Array Of Property
   * @trans["鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"]
   * @return Cn string
   */
  Animals: [
    '\u9f20',
    '\u725b',
    '\u864e',
    '\u5154',
    '\u9f99',
    '\u86c7',
    '\u9a6c',
    '\u7f8a',
    '\u7334',
    '\u9e21',
    '\u72d7',
    '\u732a'
  ],

  /**
   * 24节气速查表
   * @Array Of Property
   * @trans["小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"]
   * @return Cn string
   */
  solarTerm: [
    '\u5c0f\u5bd2',
    '\u5927\u5bd2',
    '\u7acb\u6625',
    '\u96e8\u6c34',
    '\u60ca\u86f0',
    '\u6625\u5206',
    '\u6e05\u660e',
    '\u8c37\u96e8',
    '\u7acb\u590f',
    '\u5c0f\u6ee1',
    '\u8292\u79cd',
    '\u590f\u81f3',
    '\u5c0f\u6691',
    '\u5927\u6691',
    '\u7acb\u79cb',
    '\u5904\u6691',
    '\u767d\u9732',
    '\u79cb\u5206',
    '\u5bd2\u9732',
    '\u971c\u964d',
    '\u7acb\u51ac',
    '\u5c0f\u96ea',
    '\u5927\u96ea',
    '\u51ac\u81f3'
  ],

  /**
   * 1900-2100各年的24节气日期速查表
   * @Array Of Property
   * @return 0x string For splice
   */
  sTermInfo: [
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    '7f07e7f0e37f14998082b0787b0721',
    '7f07e7f0e47f531b0723b0b6fb0722',
    '7f0e36665b66aa89801e9808297c35',
    '665f67f0e37f14898082b0723b02d5',
    '7ec967f0e37f14998082b0787b0721',
    '7f07e7f0e47f531b0723b0b6fb0722',
    '7f0e36665b66a449801e9808297c35',
    '665f67f0e37f14898082b0723b02d5',
    '7ec967f0e37f14998082b0787b06bd',
    '7f07e7f0e47f531b0723b0b6fb0721',
    '7f0e36665b66a449801e9808297c35',
    '665f67f0e37f14898082b072297c35',
    '7ec967f0e37f14998082b0787b06bd',
    '7f07e7f0e47f531b0723b0b6fb0721',
    '7f0e26665b66a449801e9808297c35',
    '665f67f0e37f1489801eb072297c35',
    '7ec967f0e37f14998082b0787b06bd',
    '7f07e7f0e47f531b0723b0b6fb0721',
    '7f0e27f1487f531b0b0bb0b6fb0722'
  ],

  /**
   * 数字转中文速查表
   * @Array Of Property
   * @trans ['日','一','二','三','四','五','六','七','八','九','十']
   * @return Cn string
   */
  nStr1: [
    '\u65e5',
    '\u4e00',
    '\u4e8c',
    '\u4e09',
    '\u56db',
    '\u4e94',
    '\u516d',
    '\u4e03',
    '\u516b',
    '\u4e5d',
    '\u5341'
  ],

  /**
   * 日期转农历称呼速查表
   * @Array Of Property
   * @trans ['初','十','廿','卅']
   * @return Cn string
   */
  nStr2: ['\u521d', '\u5341', '\u5eff', '\u5345'],

  /**
   * 月份转农历称呼速查表
   * @Array Of Property
   * @trans ['正','一','二','三','四','五','六','七','八','九','十','冬','腊']
   * @return Cn string
   */
  nStr3: [
    '\u6b63',
    '\u4e8c',
    '\u4e09',
    '\u56db',
    '\u4e94',
    '\u516d',
    '\u4e03',
    '\u516b',
    '\u4e5d',
    '\u5341',
    '\u51ac',
    '\u814a'
  ],

  /**
   * 返回农历y年一整年的总天数
   * @param lunar Year
   * @return Number
   * @eg:var count = calendar.lYearDays(1987) ;//count=387
   */
  lYearDays: function(y) {
    let i;
    let sum = 348;
    for (i = 0x8000; i > 0x8; i >>= 1) {
      sum += calendar.lunarInfo[y - 1900] & i ? 1 : 0;
    }
    return sum + calendar.leapDays(y);
  },

  /**
   * 返回农历y年闰月是哪个月；若y年没有闰月 则返回0
   * @param lunar Year
   * @return Number (0-12)
   * @eg:var leapMonth = calendar.leapMonth(1987) ;//leapMonth=6
   */
  leapMonth: function(y) {
    // 闰字编码 \u95f0
    return calendar.lunarInfo[y - 1900] & 0xf;
  },

  /**
   * 返回农历y年闰月的天数 若该年没有闰月则返回0
   * @param lunar Year
   * @return Number (0、29、30)
   * @eg:var leapMonthDay = calendar.leapDays(1987) ;//leapMonthDay=29
   */
  leapDays: function(y) {
    if (calendar.leapMonth(y)) {
      return calendar.lunarInfo[y - 1900] & 0x10000 ? 30 : 29;
    }
    return 0;
  },

  /**
   * 返回农历y年m月（非闰月）的总天数，计算m为闰月时的天数请使用leapDays方法
   * @param lunar Year
   * @return Number (-1、29、30)
   * @eg:var MonthDay = calendar.monthDays(1987,9) ;//MonthDay=29
   */
  monthDays: function(y, m) {
    if (m > 12 || m < 1) return -1; // 月份参数从1至12，参数错误返回-1
    return calendar.lunarInfo[y - 1900] & (0x10000 >> m) ? 30 : 29;
  },

  /**
   * 返回公历(!)y年m月的天数
   * @param solar Year
   * @return Number (-1、28、29、30、31)
   * @eg:var solarMonthDay = calendar.leapDays(1987) ;//solarMonthDay=30
   */
  solarDays: function(y, m) {
    if (m > 12 || m < 1) return -1; // 若参数错误 返回-1
    const ms = m - 1;
    if (+ms === 1) {
      // 2月份的闰平规律测算后确认返回28或29
      return (y % 4 === 0 && y % 100 !== 0) || y % 400 === 0 ? 29 : 28;
    } else {
      return calendar.solarMonth[ms];
    }
  },

  /**
   * 农历年份转换为干支纪年
   * @param  lYear 农历年的年份数
   * @return Cn string
   */
  toGanZhiYear: function(lYear) {
    let ganKey = (lYear - 3) % 10;
    let zhiKey = (lYear - 3) % 12;
    if (+ganKey === 0) ganKey = 10; // 如果余数为0则为最后一个天干
    if (+zhiKey === 0) zhiKey = 12; // 如果余数为0则为最后一个地支
    return calendar.Gan[ganKey - 1] + calendar.Zhi[zhiKey - 1];
  },

  /**
   * 公历月、日判断所属星座
   * @param  cMonth [description]
   * @param  cDay [description]
   * @return Cn string
   */
  toAstro: function(cMonth, cDay) {
    const s =
      '\u9b54\u7faf\u6c34\u74f6\u53cc\u9c7c\u767d\u7f8a\u91d1\u725b\u53cc\u5b50\u5de8\u87f9\u72ee\u5b50\u5904\u5973\u5929\u79e4\u5929\u874e\u5c04\u624b\u9b54\u7faf';
    const arr = [20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22];
    return (
      s.substr(cMonth * 2 - (cDay < arr[cMonth - 1] ? 2 : 0), 2) + '\u5ea7'
    ); // 座
  },

  /**
   * 传入offset偏移量返回干支
   * @param offset 相对甲子的偏移量
   * @return Cn string
   */
  toGanZhi: function(offset) {
    return calendar.Gan[offset % 10] + calendar.Zhi[offset % 12];
  },

  /**
   * 传入公历(!)y年获得该年第n个节气的公历日期
   * @param y公历年(1900-2100)；n二十四节气中的第几个节气(1~24)；从n=1(小寒)算起
   * @return day Number
   * @eg:var _24 = calendar.getTerm(1987,3) ;//_24=4;意即1987年2月4日立春
   */
  getTerm: function(y, n) {
    if (y < 1900 || y > 2100) return -1;
    if (n < 1 || n > 24) return -1;
    const _table = calendar.sTermInfo[y - 1900];
    const _info = [
      parseInt('0x' + _table.substr(0, 5)).toString(),
      parseInt('0x' + _table.substr(5, 5)).toString(),
      parseInt('0x' + _table.substr(10, 5)).toString(),
      parseInt('0x' + _table.substr(15, 5)).toString(),
      parseInt('0x' + _table.substr(20, 5)).toString(),
      parseInt('0x' + _table.substr(25, 5)).toString()
    ];
    const _calday = [
      _info[0].substr(0, 1),
      _info[0].substr(1, 2),
      _info[0].substr(3, 1),
      _info[0].substr(4, 2),

      _info[1].substr(0, 1),
      _info[1].substr(1, 2),
      _info[1].substr(3, 1),
      _info[1].substr(4, 2),

      _info[2].substr(0, 1),
      _info[2].substr(1, 2),
      _info[2].substr(3, 1),
      _info[2].substr(4, 2),

      _info[3].substr(0, 1),
      _info[3].substr(1, 2),
      _info[3].substr(3, 1),
      _info[3].substr(4, 2),

      _info[4].substr(0, 1),
      _info[4].substr(1, 2),
      _info[4].substr(3, 1),
      _info[4].substr(4, 2),

      _info[5].substr(0, 1),
      _info[5].substr(1, 2),
      _info[5].substr(3, 1),
      _info[5].substr(4, 2)
    ];
    return parseInt(_calday[n - 1]);
  },

  /**
   * 传入农历数字月份返回汉语通俗表示法
   * @param lunar month
   * @return Cn string
   * @eg:var cnMonth = calendar.toChinaMonth(12) ;//cnMonth='腊月'
   */
  toChinaMonth: function(m) {
    // 月 => \u6708
    if (m > 12 || m < 1) return -1; // 若参数错误 返回-1
    let s = calendar.nStr3[m - 1];
    s += '\u6708'; // 加上月字
    return s;
  },

  /**
   * 传入农历日期数字返回汉字表示法
   * @param lunar day
   * @return Cn string
   * @eg:var cnDay = calendar.toChinaDay(21) ;//cnMonth='廿一'
   */
  toChinaDay: function(d) {
    // 日 => \u65e5
    let s;
    switch (d) {
      case 10:
        s = '\u521d\u5341';
        break;
      case 20:
        s = '\u4e8c\u5341';
        break;
      case 30:
        s = '\u4e09\u5341';
        break;
      default:
        s = calendar.nStr2[Math.floor(d / 10)];
        s += calendar.nStr1[d % 10];
    }
    return s;
  },

  /**
   * 年份转生肖[!仅能大致转换] => 精确划分生肖分界线是“立春”
   * @param y year
   * @return Cn string
   * @eg:var animal = calendar.getAnimal(1987) ;//animal='兔'
   */
  getAnimal: function(y) {
    return calendar.Animals[(y - 4) % 12];
  },

  /**
   * 传入阳历年月日获得详细的公历、农历object信息 <=>JSON
   * @param y  solar year
   * @param m  solar month
   * @param d  solar day
   * @return JSON object
   * @eg:console.log(calendar.solar2lunar(1987,11,01));
   */
  solar2lunar: function(y, m, d) {
    // 参数区间1900.1.31~2100.12.31
    // 年份限定、上限
    if (y < 1900 || y > 2100) {
      return -1; // undefined转换为数字变为NaN
    }
    // 公历传参最下限
    if (+y === 1900 && +m === 1 && +d < 31) {
      return -1;
    }
    // 未传参 获得当天
    let objDate;
    if (!y) {
      objDate = new Date();
    } else {
      objDate = new Date(y, parseInt(m) - 1, d);
    }
    let i;
    let leap = 0;
    let temp = 0;
    // 修正ymd参数
    y = objDate.getFullYear();
    m = objDate.getMonth() + 1;
    d = objDate.getDate();
    let offset =
      (Date.UTC(objDate.getFullYear(), objDate.getMonth(), objDate.getDate()) -
        Date.UTC(1900, 0, 31)) /
      86400000;
    for (i = 1900; i < 2101 && offset > 0; i++) {
      temp = calendar.lYearDays(i);
      offset -= temp;
    }
    if (offset < 0) {
      offset += temp;
      i--;
    }

    // 是否今天
    const isTodayObj = new Date();
    let isToday = false;
    if (
      isTodayObj.getFullYear() === +y &&
      isTodayObj.getMonth() + 1 === +m &&
      isTodayObj.getDate() === +d
    ) {
      isToday = true;
    }
    // 星期几
    let nWeek = objDate.getDay();
    const cWeek = calendar.nStr1[nWeek];
    // 数字表示周几顺应天朝周一开始的惯例
    if (+nWeek === 0) {
      nWeek = 7;
    }
    // 农历年
    const year = i;
    leap = calendar.leapMonth(i); // 闰哪个月
    let isLeap = false;

    // 效验闰月
    for (i = 1; i < 13 && offset > 0; i++) {
      // 闰月
      if (leap > 0 && i === leap + 1 && isLeap === false) {
        --i;
        isLeap = true;
        temp = calendar.leapDays(year); // 计算农历闰月天数
      } else {
        temp = calendar.monthDays(year, i); // 计算农历普通月天数
      }
      // 解除闰月
      if (isLeap === true && i === leap + 1) isLeap = false;
      offset -= temp;
    }
    // 闰月导致数组下标重叠取反
    if (offset === 0 && leap > 0 && i === leap + 1) {
      if (isLeap) {
        isLeap = false;
      } else {
        isLeap = true;
        --i;
      }
    }
    if (offset < 0) {
      offset += temp;
      --i;
    }
    // 农历月
    const month = i;
    // 农历日
    const day = offset + 1;
    // 天干地支处理
    const sm = m - 1;
    const gzY = calendar.toGanZhiYear(year);

    // 当月的两个节气
    // bugfix-2017-7-24 11:03:38 use lunar Year Param `y` Not `year`
    const firstNode = calendar.getTerm(y, m * 2 - 1); // 返回当月「节」为几日开始
    const secondNode = calendar.getTerm(y, m * 2); // 返回当月「节」为几日开始

    // 依据12节气修正干支月
    let gzM = calendar.toGanZhi((y - 1900) * 12 + m + 11);
    if (d >= firstNode) {
      gzM = calendar.toGanZhi((y - 1900) * 12 + m + 12);
    }

    // 传入的日期的节气与否
    let isTerm = false;
    let Term = null;
    if (+firstNode === d) {
      isTerm = true;
      Term = calendar.solarTerm[m * 2 - 2];
    }
    if (+secondNode === d) {
      isTerm = true;
      Term = calendar.solarTerm[m * 2 - 1];
    }
    // 日柱 当月一日与 1900/1/1 相差天数
    const dayCyclical = Date.UTC(y, sm, 1, 0, 0, 0, 0) / 86400000 + 25567 + 10;
    const gzD = calendar.toGanZhi(dayCyclical + d - 1);
    // 该日期所属的星座
    const astro = calendar.toAstro(m, d);

    return {
      lYear: year,
      lMonth: month,
      lDay: day,
      Animal: calendar.getAnimal(year),
      IMonthCn: (isLeap ? '\u95f0' : '') + calendar.toChinaMonth(month),
      IDayCn: calendar.toChinaDay(day),
      cYear: y,
      cMonth: m,
      cDay: d,
      gzYear: gzY,
      gzMonth: gzM,
      gzDay: gzD,
      isToday: isToday,
      isLeap: isLeap,
      nWeek: nWeek,
      ncWeek: '\u661f\u671f' + cWeek,
      isTerm: isTerm,
      Term: Term,
      astro: astro
    };
  },

  /**
   * 传入农历年月日以及传入的月份是否闰月获得详细的公历、农历object信息 <=>JSON
   * @param y  lunar year
   * @param m  lunar month
   * @param d  lunar day
   * @param isLeapMonth  lunar month is leap or not.[如果是农历闰月第四个参数赋值true即可]
   * @return JSON object
   * @eg:console.log(calendar.lunar2solar(1987,9,10));
   */
  lunar2solar: function(y, m, d, isLeapMonth) {
    // 参数区间1900.1.31~2100.12.1
    isLeapMonth = !!isLeapMonth;
    // let leapOffset = 0;
    const leapMonth = calendar.leapMonth(y);
    // let leapDay = calendar.leapDays(y);
    if (isLeapMonth && leapMonth !== m) return -1; // 传参要求计算该闰月公历 但该年得出的闰月与传参的月份并不同
    if (
      (+y === 2100 && +m === 12 && +d > 1) ||
      (+y === 1900 && +m === 1 && +d < 31)
    )
      return -1; // 超出了最大极限值
    const day = calendar.monthDays(y, m);
    let _day = day;
    // bugFix 2016-9-25
    // if month is leap, _day use leapDays method
    if (isLeapMonth) {
      _day = calendar.leapDays(y, m);
    }
    if (y < 1900 || y > 2100 || d > _day) return -1; // 参数合法性效验

    // 计算农历的时间差
    let offset = 0;
    for (let i = 1900; i < y; i++) {
      offset += calendar.lYearDays(i);
    }
    let leap = 0;
    let isAdd = false;
    for (let i = 1; i < m; i++) {
      leap = calendar.leapMonth(y);
      if (!isAdd) {
        // 处理闰月
        if (leap <= i && leap > 0) {
          offset += calendar.leapDays(y);
          isAdd = true;
        }
      }
      offset += calendar.monthDays(y, i);
    }
    // 转换闰月农历 需补充该年闰月的前一个月的时差
    if (isLeapMonth) offset += day;
    // 1900年农历正月一日的公历时间为1900年1月30日0时0分0秒(该时间也是本农历的最开始起始点)
    const stmap = Date.UTC(1900, 1, 30, 0, 0, 0);
    const calObj = new Date((offset + d - 31) * 86400000 + stmap);
    const cY = calObj.getUTCFullYear();
    const cM = calObj.getUTCMonth() + 1;
    const cD = calObj.getUTCDate();

    return calendar.solar2lunar(cY, cM, cD);
  }
};

const {
  Gan,
  Zhi,
  nStr1,
  nStr2,
  nStr3,
  Animals,
  solarTerm,
  lunarInfo,
  sTermInfo,
  solarMonth,
  ...rest
} = calendar;

export default rest;
